1
|
Malik M, Senatore R, Langer T, Holzer W, Pace V. Base-mediated homologative rearrangement of nitrogen-oxygen bonds of N-methyl- N-oxyamides. Chem Sci 2023; 14:10140-10146. [PMID: 37772102 PMCID: PMC10530184 DOI: 10.1039/d3sc03216g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 08/26/2023] [Indexed: 09/30/2023] Open
Abstract
Due to the well known reactivity of C(O)-N functionalities towards canonical C1-homologating agents (e.g. carbenoids, diazomethane, ylides), resulting in the extrusion of the N-centered fragment en route to carbonyl compounds, formal C1-insertions within N-O bonds still remain obscure. Herein, we document the homologative transformation of N-methyl-N-oxyamides - with high tolerance for diverse O-substituents - into N-acyl-N,O-acetals. Under controlled basic conditions, the N-methyl group of the same starting materials acts as a competent precursor of the methylene synthon required for the homologation. The logic is levered on the formation of an electrophilic iminium ion (via N-O heterolysis) susceptible to nucleophilic attack by the alkoxide previously expulsed. The procedure documents genuine chemocontrol and flexibility, as judged by the diversity of substituents placed on both amide and nitrogen linchpins. The mechanistic rationale was validated through experiments conducted on D-labeled materials which unambiguously attributed the origin of the methylene fragment to the N-methyl group of the starting compounds.
Collapse
Affiliation(s)
- Monika Malik
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna Josef-Holaubek-Platz 2 1090 Vienna Austria
| | - Raffaele Senatore
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna Josef-Holaubek-Platz 2 1090 Vienna Austria
| | - Thierry Langer
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna Josef-Holaubek-Platz 2 1090 Vienna Austria
| | - Wolfgang Holzer
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna Josef-Holaubek-Platz 2 1090 Vienna Austria
| | - Vittorio Pace
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna Josef-Holaubek-Platz 2 1090 Vienna Austria
- Department of Chemistry, University of Turin Via Giuria 7 10125 Turin Italy
| |
Collapse
|
2
|
Malik M, Senatore R, Castiglione D, Roller-Prado A, Pace V. Highly chemoselective homologative assembly of the α-substituted methylsulfinamide motif from N-sulfinylamines. Chem Commun (Camb) 2023; 59:11065-11068. [PMID: 37644820 DOI: 10.1039/d3cc03326k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
α-Substituted methylsulfinamide are prepared through the homologation of electrophilic N-sulfinylamines with Li-CHXY reagents. The transformation takes place under full chemocontrol and exhibits good flexibility for preparing both N-aryl and N-alkyl analogues. Various sensitive functionalities can be accommodated on the starting materials, thus documenting a wide reaction scope.
Collapse
Affiliation(s)
- Monika Malik
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna, Josef-Holaubek-Platz 2, 1090, Vienna, Austria.
| | - Raffaele Senatore
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna, Josef-Holaubek-Platz 2, 1090, Vienna, Austria.
| | - Davide Castiglione
- Department of Chemistry, Via Giuria 7, University of Turin, Turin 10125, Italy
| | - Alexander Roller-Prado
- Department of Inorganic Chemistry - Functional Materials, University of Vienna, Waehringerstrasse 42, 1090, Vienna, Austria
| | - Vittorio Pace
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna, Josef-Holaubek-Platz 2, 1090, Vienna, Austria.
- Department of Chemistry, Via Giuria 7, University of Turin, Turin 10125, Italy
| |
Collapse
|
3
|
Ielo L, Patamia V, Citarella A, Schirmeister T, Stagno C, Rescifina A, Micale N, Pace V. Selective noncovalent proteasome inhibiting activity of trifluoromethyl-containing gem-quaternary aziridines. Arch Pharm (Weinheim) 2023:e2300174. [PMID: 37119396 DOI: 10.1002/ardp.202300174] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 05/01/2023]
Abstract
The ubiquitin-proteasome pathway (UPP) represents the principal proteolytic apparatus in the cytosol and nucleus of all eukaryotic cells. Nowadays, proteasome inhibitors (PIs) are well-known as anticancer agents. However, although three of them have been approved by the US Food and Drug Administration (FDA) for treating multiple myeloma and mantel cell lymphoma, they present several side effects and develop resistance. For these reasons, the development of new PIs with better pharmacological characteristics is needed. Recently, noncovalent inhibitors have gained much attention since they are less toxic as compared with covalent ones, providing an alternative mechanism for solid tumors. Herein, we describe a new class of bis-homologated chloromethyl(trifluoromethyl)aziridines as selective noncovalent PIs. In silico and in vitro studies were conducted to elucidate the mechanism of action of such compounds. Human gastrointestinal absorption (HIA) and blood-brain barrier (BBB) penetration were also considered together with absorption, distribution, metabolism, and excretion (ADMET) predictions.
Collapse
Affiliation(s)
- Laura Ielo
- Department of Chemistry, University of Turin, Torino, Italy
| | - Vincenzo Patamia
- Department of Drug and Health Sciences, University of Catania, Catania, Italy
| | | | - Tanja Schirmeister
- Department of Medicinal Chemistry, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Mainz, Germany
| | - Claudio Stagno
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Antonio Rescifina
- Department of Drug and Health Sciences, University of Catania, Catania, Italy
| | - Nicola Micale
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Vittorio Pace
- Department of Chemistry, University of Turin, Torino, Italy
- Department of Pharmaceutical Sciences, Division of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| |
Collapse
|
4
|
Takeda N, Suganuma R, Yasui M, Ueda M. Synthesis of isolable β-chloroenamines from N-alkoxylactams with organometallic reagents. Org Biomol Chem 2023; 21:1435-1439. [PMID: 36649121 DOI: 10.1039/d2ob02151j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
An efficient approach to access isolable β-chloroenamines via nucleophilic addition/dehydration of α-chloro N-alkoxylactam with organolithium and Grignard reagents is reported. This approach is amenable to the synthesis of β-chloroenamines by incorporating various C(sp) and C(sp2) units, such as alkyne, aryl, and heteroaryl moieties. The sequential reaction has a broad substrate scope and can be carried out for a scalable synthesis of β-chloroenamines. Control experiments suggested that both chloro and alkoxy groups act as inductive electron-withdrawing substituents to improve the stability of the enamines.
Collapse
Affiliation(s)
- Norihiko Takeda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Riku Suganuma
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Motohiro Yasui
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Masafumi Ueda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| |
Collapse
|
5
|
Novel Class of Proteasome Inhibitors: In Silico and In Vitro Evaluation of Diverse Chloro(trifluoromethyl)aziridines. Int J Mol Sci 2022; 23:ijms232012363. [PMID: 36293216 PMCID: PMC9603864 DOI: 10.3390/ijms232012363] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 09/30/2022] [Accepted: 10/11/2022] [Indexed: 01/24/2023] Open
Abstract
The ubiquitin-proteasome pathway (UPP) is the major proteolytic system in the cytosol and nucleus of all eukaryotic cells. The role of proteasome inhibitors (PIs) as critical agents for regulating cancer cell death has been established. Aziridine derivatives are well-known alkylating agents employed against cancer. However, to the best of our knowledge, aziridine derivatives showing inhibitory activity towards proteasome have never been described before. Herein we report a new class of selective and nonPIs bearing an aziridine ring as a core structure. In vitro cell-based assays (two leukemia cell lines) also displayed anti-proliferative activity for some compounds. In silico studies indicated non-covalent binding mode and drug-likeness for these derivatives. Taken together, these results are promising for developing more potent PIs.
Collapse
|
6
|
Senatore R, Malik M, Pace V. Fluoroiodomethane: A CH2F‐Moiety Delivering Agent Suitable for Nucleophilic‐, Electrophilic‐ and Radical‐Harnessed Operations. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
7
|
The importance of Brønsted acid sites on C O bond rupture selectivities during hydrogenation and hydrogenolysis of esters. J Catal 2022. [DOI: 10.1016/j.jcat.2022.05.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
8
|
Gu Y, Zhang Z, Wang YE, Dai Z, Yuan Y, Xiong D, Li J, Walsh PJ, Mao J. Benzylic Aroylation of Toluenes Mediated by a LiN(SiMe 3) 2/Cs + System. J Org Chem 2021; 87:406-418. [PMID: 34958592 DOI: 10.1021/acs.joc.1c02446] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Chemoselective deprotonative functionalization of benzylic C-H bonds is challenging, because the arene ring contains multiple aromatic C(sp2)-H bonds, which can be competitively deprotonated and lead to selectivity issues. Recently it was found that bimetallic [MN(SiMe3)2 M = Li, Na]/Cs+ combinations exhibit excellent benzylic selectivity. Herein, is reported the first deprotonative addition of toluenes to Weinreb amides mediated by LiN(SiMe3)2/CsF for the synthesis of a diverse array of 2-arylacetophenones. Surprisingly, simple methyl benzoates also react with toluenes under similar conditions to form 2-arylacetophenones without double addition to give tertiary alcohol products. This finding greatly increases the practicality and impact of this chemistry. Some challenging substrates with respect to benzylic deprotonations, such as fluoro and methoxy substituted toluenes, are selectively transformed to 2-aryl acetophenones. The value of benzylic deprotonation of 3-fluorotoluene is demonstrated by the synthesis of a key intermediate in the preparation of Polmacoxib.
Collapse
Affiliation(s)
- Yuanyun Gu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Zhen Zhang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Yan-En Wang
- College of Science, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Ziteng Dai
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Yaqi Yuan
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Dan Xiong
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Jie Li
- Department of Pharmacy, School of Medicine, Zhejiang University City College, No. 48, Huzhou Road, Hangzhou 310015, P. R. China
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Jianyou Mao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| |
Collapse
|
9
|
Li G, Szostak M. Synthesis of biaryl ketones by arylation of Weinreb amides with functionalized Grignard reagents under thermodynamic control vs. kinetic control of N,N-Boc 2-amides. Org Biomol Chem 2021; 18:3827-3831. [PMID: 32396595 DOI: 10.1039/d0ob00813c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A highly efficient method for chemoselective synthesis of biaryl ketones by arylation of Weinreb amides (N-methoxy-N-methylamides) with functionalized Grignard reagents is reported. This protocol offers rapid entry to functionalized biaryl ketones after Mg/halide exchange with i-PrMgCl·LiCl under operationally-simple and practical reaction conditions. The scope of the method is highlighted in >40 examples, including bioactive compounds and pharmaceutical derivatives. Collectively, this transition-metal-free approach offers a major advantage over the recently established cross-coupling of amides by oxidative addition of N-C(O) bonds. Considering the utility of amide acylation reactions in modern synthesis, we expect that this method will be of broad interest.
Collapse
Affiliation(s)
- Guangchen Li
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA.
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA.
| |
Collapse
|
10
|
Touqeer S, Ielo L, Miele M, Urban E, Holzer W, Pace V. Direct and straightforward transfer of C1 functionalized synthons to phosphorous electrophiles for accessing gem-P-containing methanes. Org Biomol Chem 2021; 19:2425-2429. [PMID: 33666635 DOI: 10.1039/d1ob00273b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The direct transfer of different α-substituted methyllithium reagents to chlorinated phosphorous electrophiles of diverse oxidation state (phosphates, phosphine oxides and phosphines) is proposed as an effective strategy to synthesize geminal P-containing methanes. The methodology relies on the efficient nucleophilic substitution conducted on the P-chlorine linkage. Uniformly high yields are observed regardless the specific nature of the carbanion employed: once established the conditions for generating the competent nucleophile (LiCH2Hal, LiCHHal2, LiCH2CN, LiCH2SeR etc.) the homologated compounds are obtained via a single operation. Some P-containing formal carbanions have been evaluated in transferring processes, including the carbonyl-difluoromethylation of the opioid agent Hydrocodone.
Collapse
Affiliation(s)
- Saad Touqeer
- Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 14, Vienna, Austria
| | | | | | | | | | | |
Collapse
|
11
|
Ghinato S, Territo D, Maranzana A, Capriati V, Blangetti M, Prandi C. A Fast and General Route to Ketones from Amides and Organolithium Compounds under Aerobic Conditions: Synthetic and Mechanistic Aspects. Chemistry 2021; 27:2868-2874. [PMID: 33150980 DOI: 10.1002/chem.202004840] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Indexed: 12/11/2022]
Abstract
We report that the nucleophilic acyl substitution reaction of aliphatic and (hetero)aromatic amides by organolithium reagents proceeds quickly (20 s reaction time), efficiently, and chemoselectively with a broad substrate scope in the environmentally responsible cyclopentyl methyl ether, at ambient temperature and under air, to provide ketones in up to 93 % yield with an effective suppression of the notorious over-addition reaction. Detailed DFT calculations and NMR investigations support the experimental results. The described methodology was proven to be amenable to scale-up and recyclability protocols. Contrasting classical procedures carried out under inert atmospheres, this work lays the foundation for a profound paradigm shift of the reactivity of carboxylic acid amides with organolithiums, with ketones being straightforwardly obtained by simply combining the reagents under aerobic conditions and with no need of using previously modified or pre-activated amides, as recommended.
Collapse
Affiliation(s)
- Simone Ghinato
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, 10125, Torino, Italy
| | - Davide Territo
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, 10125, Torino, Italy
| | - Andrea Maranzana
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, 10125, Torino, Italy
| | - Vito Capriati
- Dipartimento di Farmacia-Scienze del Farmaco, Università di Bari Aldo Moro, Consorzio CINMPIS, Via E. Orabona 4, 70125, Bari, Italy
| | - Marco Blangetti
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, 10125, Torino, Italy
| | - Cristina Prandi
- Dipartimento di Chimica, Università di Torino, via P. Giuria 7, 10125, Torino, Italy
| |
Collapse
|
12
|
Takeda N, Kobori Y, Okamura K, Yasui M, Ueda M. Sequential Nucleophilic Arylation/Ring-Contractive Rearrangement of N-Alkoxylactams. Org Lett 2020; 22:9740-9744. [DOI: 10.1021/acs.orglett.0c03821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Norihiko Takeda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan
| | - Yukiko Kobori
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan
| | - Kohei Okamura
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan
| | - Motohiro Yasui
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan
| | - Masafumi Ueda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan
| |
Collapse
|
13
|
Senatore R, Malik M, Touqeer S, Listro R, Collina S, Holzer W, Pace V. Straightforward and direct access to β-seleno- amines and sulfonylamides via the controlled addition of phenylselenomethyllithium (LiCH2SePh) to imines. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
14
|
Touqeer S, Senatore R, Malik M, Urban E, Pace V. Modular and Chemoselective Strategy for Accessing (Distinct) α,α‐Dihaloketones from Weinreb Amides and Dihalomethyllithiums. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001106] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Saad Touqeer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Raffaele Senatore
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Monika Malik
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Ernst Urban
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Vittorio Pace
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
| |
Collapse
|
15
|
Miyoshi N, Kimura S, Kubo S, Ohmura SD, Ueno M. Chemoselective Ketone Synthesis by the Strontium‐mediated Alkylation or Arylation of
N
,
N
‐Dimethylamides or Urea. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000389] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Norikazu Miyoshi
- Department of Natural Science Graduate School of Advanced Technology and Science Tokushima University 2-1 Minami-jousanjima Tokushima 770-8506 Japan
- Department of Chemistry Faculty of Integrated Arts and Sciences Tokushima University 1-1 Minami-jousanjima Tokushima 770-8502 Japan
| | - Shodai Kimura
- Department of Chemistry Faculty of Integrated Arts and Sciences Tokushima University 1-1 Minami-jousanjima Tokushima 770-8502 Japan
| | - Shigeki Kubo
- Department of Chemistry Faculty of Integrated Arts and Sciences Tokushima University 1-1 Minami-jousanjima Tokushima 770-8502 Japan
| | - Satoshi D. Ohmura
- Department of Natural Science Graduate School of Advanced Technology and Science Tokushima University 2-1 Minami-jousanjima Tokushima 770-8506 Japan
- Department of Chemistry Faculty of Integrated Arts and Sciences Tokushima University 1-1 Minami-jousanjima Tokushima 770-8502 Japan
- Present address: National Institute of Technology Niihama College
| | - Masaharu Ueno
- Department of Natural Science Graduate School of Advanced Technology and Science Tokushima University 2-1 Minami-jousanjima Tokushima 770-8506 Japan
- Department of Chemistry Faculty of Integrated Arts and Sciences Tokushima University 1-1 Minami-jousanjima Tokushima 770-8502 Japan
| |
Collapse
|
16
|
Miele M, Citarella A, Langer T, Urban E, Zehl M, Holzer W, Ielo L, Pace V. Chemoselective Homologation-Deoxygenation Strategy Enabling the Direct Conversion of Carbonyls into ( n+1)-Halomethyl-Alkanes. Org Lett 2020; 22:7629-7634. [PMID: 32910659 PMCID: PMC8011987 DOI: 10.1021/acs.orglett.0c02831] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
![]()
The sequential installation
of a carbenoid and a hydride into a
carbonyl, furnishing halomethyl alkyl derivatives, is reported. Despite
the employment of carbenoids as nucleophiles in reactions with carbon-centered
electrophiles, sp3-type alkyl halides remain elusive materials
for selective one-carbon homologations. Our tactic levers on using
carbonyls as starting materials and enables uniformly high yields
and chemocontrol. The tactic is flexible and is not limited to carbenoids.
Also, diverse carbanion-like species can act as nucleophiles, thus
making it of general applicability.
Collapse
Affiliation(s)
- Margherita Miele
- Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse, 14, 1090 Vienna, Austria
| | - Andrea Citarella
- Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse, 14, 1090 Vienna, Austria.,Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno D'Alcontres, 31, 98166 Messina, Italy
| | - Thierry Langer
- Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse, 14, 1090 Vienna, Austria
| | - Ernst Urban
- Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse, 14, 1090 Vienna, Austria
| | - Martin Zehl
- Faculty of Chemistry - Department of Analytical Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Wolfgang Holzer
- Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse, 14, 1090 Vienna, Austria
| | - Laura Ielo
- Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse, 14, 1090 Vienna, Austria
| | - Vittorio Pace
- Department of Pharmaceutical Chemistry, University of Vienna, Althanstrasse, 14, 1090 Vienna, Austria.,Department of Chemistry, University of Turin, Via P. Giuria 7, 10125 Turin, Italy
| |
Collapse
|
17
|
Ielo L, Castoldi L, Touqeer S, Lombino J, Roller A, Prandi C, Holzer W, Pace V. Halogen‐Imparted Reactivity in Lithium Carbenoid Mediated Homologations of Imine Surrogates: Direct Assembly of bis‐Trifluoromethyl‐β‐Diketiminates and the Dual Role of LiCH
2
I. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Laura Ielo
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Laura Castoldi
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Saad Touqeer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Jessica Lombino
- Fondazione Ri.MED Via Bandiera 11 90133 Palermo Italy
- University of Palermo Department STEBICEF Via Archirafi 32 90123 Palermo Italy
| | - Alexander Roller
- University of Vienna X-Ray Structure Analysis Center Waehringerstrasse 42 1090 Vienna Austria
| | - Cristina Prandi
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
| | - Wolfgang Holzer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Vittorio Pace
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
| |
Collapse
|
18
|
Ielo L, Castoldi L, Touqeer S, Lombino J, Roller A, Prandi C, Holzer W, Pace V. Halogen‐Imparted Reactivity in Lithium Carbenoid Mediated Homologations of Imine Surrogates: Direct Assembly of bis‐Trifluoromethyl‐β‐Diketiminates and the Dual Role of LiCH
2
I. Angew Chem Int Ed Engl 2020; 59:20852-20857. [DOI: 10.1002/anie.202007954] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/17/2020] [Indexed: 12/21/2022]
Affiliation(s)
- Laura Ielo
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Laura Castoldi
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Saad Touqeer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Jessica Lombino
- Fondazione Ri.MED Via Bandiera 11 90133 Palermo Italy
- University of Palermo Department STEBICEF Via Archirafi 32 90123 Palermo Italy
| | - Alexander Roller
- University of Vienna X-Ray Structure Analysis Center Waehringerstrasse 42 1090 Vienna Austria
| | - Cristina Prandi
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
| | - Wolfgang Holzer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Vittorio Pace
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
| |
Collapse
|
19
|
Ielo L, Pace V, Pillari V, Miele M, Castiglione D. Carbenoid-Mediated Homologation Tactics for Assembling (Fluorinated) Epoxides and Aziridines. Synlett 2020. [DOI: 10.1055/s-0040-1706404] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Homologation strategies provide highly versatile tools in organic synthesis for the introduction of a CH2 group into a given carbon skeleton. The operation can result in diverse structural motifs by tuning of the reaction conditions and the nature of the homologating agent. In this Account, concisely contextualizing our work with lithium carbenoids (LiCH2X, LiCHXY etc) for homologating carbon-centered electrophiles, we focus on the assembly of three-membered cycles featuring fluorinated substituents. Two illustrative case studies are considered: (1) the development and employment of fluorinated carbenoids en route to rare α-fluoroepoxides and aziridines, and (2) the installation of up to halomethylenic groups on trifluoroimidoylacetyl chlorides (TFAICs) for preparing CF3-containing halo- and halomethylaziridines. Collectively, we demonstrate that the initial homologation event generated by the installation of the carbenoid, upon modulation of the conditions, serves as a tool for creating fluorinated building blocks in a single operation.
Collapse
Affiliation(s)
- Laura Ielo
- University of Vienna, Department of Pharmaceutical Chemistry
| | | | | | | | | |
Collapse
|
20
|
Yang F, Zou D, Chen S, Wang H, Zhao Y, Zhao L, Li L, Li J, Walsh PJ. Transition Metal‐Free Aroylation of Diarylmethanes with N‐Bn‐ N‐Boc Arylamides and N‐Acylpyrroles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000622] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Fan Yang
- Department of PharmacySchool of MedicineZhejiang University City College No. 48, Huzhou Road Hangzhou 310015 People's Republic of China
| | - Dong Zou
- Department of PharmacySchool of MedicineZhejiang University City College No. 48, Huzhou Road Hangzhou 310015 People's Republic of China
| | - Shuguang Chen
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Huan Wang
- Department of PharmacySchool of MedicineZhejiang University City College No. 48, Huzhou Road Hangzhou 310015 People's Republic of China
| | - Yichen Zhao
- Department of PharmacySchool of MedicineZhejiang University City College No. 48, Huzhou Road Hangzhou 310015 People's Republic of China
| | - Liyi Zhao
- Department of PharmacySchool of MedicineZhejiang University City College No. 48, Huzhou Road Hangzhou 310015 People's Republic of China
| | - Linlin Li
- Department of PharmacySchool of MedicineZhejiang University City College No. 48, Huzhou Road Hangzhou 310015 People's Republic of China
| | - Jie Li
- Department of PharmacySchool of MedicineZhejiang University City College No. 48, Huzhou Road Hangzhou 310015 People's Republic of China
| | - Patrick J. Walsh
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| |
Collapse
|
21
|
Homogeneous and heterogeneous catalytic reduction of amides and related compounds using molecular hydrogen. Nat Commun 2020; 11:3893. [PMID: 32753681 PMCID: PMC7403344 DOI: 10.1038/s41467-020-17588-5] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/30/2020] [Indexed: 01/17/2023] Open
Abstract
Catalytic hydrogenation of amides is of great interest for chemists working in organic synthesis, as the resulting amines are widely featured in natural products, drugs, agrochemicals, dyes, etc. Compared to traditional reduction of amides using (over)stoichiometric reductants, the direct hydrogenation of amides using molecular hydrogen represents a greener approach. Furthermore, amide hydrogenation is a highly versatile transformation, since not only higher amines (obtained by C–O cleavage), but also lower amines and alcohols, or amino alcohols (obtained by C–N cleavage) can be selectively accessed by fine tuning of reaction conditions. This review describes the most recent advances in the area of amide hydrogenation using H2 exclusively and molecularly defined homogeneous as well as nano-structured heterogeneous catalysts, with a special focus on catalyst development and synthetic applications. Catalytic hydrogenation of amides is a pivotal chemical transformation for both research labs and chemical production in industry. Here, the authors comprehensively review this topic by including state-of-art homogeneous and heterogeneous catalysts that can hydrogenate amides and related compounds.
Collapse
|
22
|
Sedano C, Velasco R, Feberero C, Suárez-Pantiga S, Sanz R. α-Lithiobenzyloxy as a Directed Metalation Group in ortho-Lithiation Reactions. Org Lett 2020; 22:6365-6369. [DOI: 10.1021/acs.orglett.0c02199] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Carlos Sedano
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| | - Rocío Velasco
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| | - Claudia Feberero
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| | - Samuel Suárez-Pantiga
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| | - Roberto Sanz
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| |
Collapse
|
23
|
Buchspies J, Rahman MM, Szostak R, Szostak M. N-Acylcarbazoles and N-Acylindoles: Electronically Activated Amides for N–C(O) Cross-Coupling by Nlp to Ar Conjugation Switch. Org Lett 2020; 22:4703-4709. [DOI: 10.1021/acs.orglett.0c01488] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jonathan Buchspies
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Md. Mahbubur Rahman
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Roman Szostak
- Department of Chemistry, Wroclaw University, F. Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| |
Collapse
|
24
|
Ni-catalyzed direct alcoholysis of N-acylpyrrole-type tertiary amides under mild conditions. Sci China Chem 2020. [DOI: 10.1007/s11426-019-9665-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
25
|
Papa V, Cabrero-Antonino JR, Spannenberg A, Junge K, Beller M. Homogeneous cobalt-catalyzed deoxygenative hydrogenation of amides to amines. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01078b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, the first general and efficient homogeneous cobalt-catalyzed deoxygenative hydrogenation of amides to amines is presented.
Collapse
Affiliation(s)
- Veronica Papa
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock
- Germany
| | - Jose R. Cabrero-Antonino
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock
- Germany
- Instituto de Tecnología Química
- Universitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC)
| | | | - Kathrin Junge
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock
- Germany
| | | |
Collapse
|
26
|
Li G, Szostak M. Kinetically Controlled, Highly Chemoselective Acylation of Functionalized Grignard Reagents with Amides by N−C Cleavage. Chemistry 2019; 26:611-615. [DOI: 10.1002/chem.201904678] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/05/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Guangchen Li
- Department of ChemistryRutgers University 73 Warren Street Newark NJ 07102 USA
| | - Michal Szostak
- Department of ChemistryRutgers University 73 Warren Street Newark NJ 07102 USA
| |
Collapse
|
27
|
Miele M, Citarella A, Micale N, Holzer W, Pace V. Direct and Chemoselective Synthesis of Tertiary Difluoroketones via Weinreb Amide Homologation with a CHF 2-Carbene Equivalent. Org Lett 2019; 21:8261-8265. [PMID: 31599599 DOI: 10.1021/acs.orglett.9b03024] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The homologation of Weinreb amides into difluoromethylketones with a formal nucleophilic CHF2 transfer agent is reported. Activating TMSCHF2 with potassium tert-amylate enables a convenient access to the difluorinated homologation reagent, which adds to the acylating partners. The high chemoselectivity showcased in the presence of variously multifunctionalized Weinreb amides, jointly with uniformly high yields, enables the strategy of general applicability without requiring any stabilization element for the putative carbanion.
Collapse
Affiliation(s)
- Margherita Miele
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , 1090 Vienna , Austria
| | - Andrea Citarella
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , 1090 Vienna , Austria.,University of Messina , Department of Chemical, Biological, Pharmaceutical and Environmental Sciences , Viale F. Stagno D'Alcontres, 31 , 98166 Messina , Italy
| | - Nicola Micale
- University of Messina , Department of Chemical, Biological, Pharmaceutical and Environmental Sciences , Viale F. Stagno D'Alcontres, 31 , 98166 Messina , Italy
| | - Wolfgang Holzer
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , 1090 Vienna , Austria
| | - Vittorio Pace
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , 1090 Vienna , Austria
| |
Collapse
|
28
|
Ghinato S, Dilauro G, Perna FM, Capriati V, Blangetti M, Prandi C. Directed ortho-metalation-nucleophilic acyl substitution strategies in deep eutectic solvents: the organolithium base dictates the chemoselectivity. Chem Commun (Camb) 2019; 55:7741-7744. [PMID: 31168546 DOI: 10.1039/c9cc03927a] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Directed ortho metalation (DoM) or nucleophilic acyl substitution (SNAc) can be efficiently programmed on the same aromatic carboxylic acid amide, in a choline chloride-based eutectic mixture, by simply switching the nature of the organolithium reagent. Telescoped, one-pot ortho-lithiation/Suzuki-Miyaura cross-couplings have also been demonstrated for the first time in Deep Eutectic Solvents.
Collapse
Affiliation(s)
- Simone Ghinato
- Dipartimento di Chimica, Università di Torino, Via P. Giuria 7, I-10125 Torino, Italy.
| | - Giuseppe Dilauro
- Dipartimento di Farmacia-Scienze del Farmaco, Università di Bari "A. Moro", Consorzio C.I.N.M.P.I.S., Via E. Orabona 4, I-70125 Bari, Italy.
| | - Filippo Maria Perna
- Dipartimento di Farmacia-Scienze del Farmaco, Università di Bari "A. Moro", Consorzio C.I.N.M.P.I.S., Via E. Orabona 4, I-70125 Bari, Italy.
| | - Vito Capriati
- Dipartimento di Farmacia-Scienze del Farmaco, Università di Bari "A. Moro", Consorzio C.I.N.M.P.I.S., Via E. Orabona 4, I-70125 Bari, Italy.
| | - Marco Blangetti
- Dipartimento di Chimica, Università di Torino, Via P. Giuria 7, I-10125 Torino, Italy.
| | - Cristina Prandi
- Dipartimento di Chimica, Università di Torino, Via P. Giuria 7, I-10125 Torino, Italy.
| |
Collapse
|
29
|
Monticelli S, Holzer W, Langer T, Roller A, Olofsson B, Pace V. Sustainable Asymmetric Organolithium Chemistry: Enantio- and Chemoselective Acylations through Recycling of Solvent, Sparteine, and Weinreb "Amine". CHEMSUSCHEM 2019; 12:1147-1154. [PMID: 30614208 PMCID: PMC6704367 DOI: 10.1002/cssc.201802815] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 12/20/2018] [Indexed: 05/10/2023]
Abstract
The well-established Hoppe-Beak chemistry, which involves enantioselective generation of organolithium compounds in the presence of (-)-sparteine, was revisited and applied to unprecedented acylations with Weinreb amides to access highly enantioenriched α-oxyketones and cyclic α-aminoketones. Recycling of the sustainable solvent cyclopentyl methyl ether, sparteine, and the released Weinreb "amine" [HNMe(OMe)] was possible through a simple work-up procedure that enabled full recovery of these precious materials. The methodology features a robust scope and flexibility, thus allowing the enantioselective preparation of scaffolds amenable of further derivatization.
Collapse
Affiliation(s)
- Serena Monticelli
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse,14Vienna1090Austria
| | - Wolfgang Holzer
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse,14Vienna1090Austria
| | - Thierry Langer
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse,14Vienna1090Austria
| | - Alexander Roller
- X-Ray Structure Analysis CenterUniversity of ViennaWaehringerstrasse 42Vienna1090Austria
| | - Berit Olofsson
- Department of Organic Chemistry, Arrhenius LaboratoryStockholm UniversitySe-106 91StockholmSweden
| | - Vittorio Pace
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse,14Vienna1090Austria
| |
Collapse
|
30
|
Yang ZP, Lu GS, Ye JL, Huang PQ. Ir-catalyzed chemoselective reduction of β-amido esters: A versatile approach to β-enamino esters. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
31
|
Monticelli S, Urban E, Langer T, Holzer W, Pace V. A Straightforward Homologation of Carbon Dioxide with Magnesium Carbenoids en Route to α-Halocarboxylic Acids. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801614] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Serena Monticelli
- University of Vienna; Department of Pharmaceutical Chemistry; Althanstrasse 14-1090 Vienna Austria
| | - Ernst Urban
- University of Vienna; Department of Pharmaceutical Chemistry; Althanstrasse 14-1090 Vienna Austria
| | - Thierry Langer
- University of Vienna; Department of Pharmaceutical Chemistry; Althanstrasse 14-1090 Vienna Austria
| | - Wolfgang Holzer
- University of Vienna; Department of Pharmaceutical Chemistry; Althanstrasse 14-1090 Vienna Austria
| | - Vittorio Pace
- University of Vienna; Department of Pharmaceutical Chemistry; Althanstrasse 14-1090 Vienna Austria
| |
Collapse
|
32
|
Liu YP, Wang SR, Chen TT, Yu CC, Wang AE, Huang PQ. Enamines as Surrogates of Alkyl Carbanions for the Direct Conversion of Secondary Amides to α-Branched Ketones. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yong-Peng Liu
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005, Fujian People's Republic of China
| | - Shu-Ren Wang
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005, Fujian People's Republic of China
| | - Ting-Ting Chen
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005, Fujian People's Republic of China
| | - Cun-Cun Yu
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005, Fujian People's Republic of China
| | - Ai-E Wang
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005, Fujian People's Republic of China
- State Key Laboratory of Applied Organic Chemistry Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Pei-Qiang Huang
- Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005, Fujian People's Republic of China
- State Key Laboratory of Applied Organic Chemistry Lanzhou University; Lanzhou 730000 People's Republic of China
| |
Collapse
|
33
|
Azzena U, Carraro M, Pisano L, Monticelli S, Bartolotta R, Pace V. Cyclopentyl Methyl Ether: An Elective Ecofriendly Ethereal Solvent in Classical and Modern Organic Chemistry. CHEMSUSCHEM 2019; 12:40-70. [PMID: 30246930 PMCID: PMC6391966 DOI: 10.1002/cssc.201801768] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/23/2018] [Indexed: 05/07/2023]
Abstract
Solvents represent one of the major contributions to the environmental impact of fine-chemical synthesis. As a result, the use of environmentally friendly solvents in widely employed reactions is a challenge of vast real interest in contemporary organic chemistry. Within this Review, a great variety of examples showing how cyclopentyl methyl ether has been established as particularly useful for this purpose are reported. Indeed, its low toxicity, high boiling point, low melting point, hydrophobicity, chemical stability towards a wide range of conditions, exceptional stability towards the abstraction of hydrogen atoms, relatively low latent heat of vaporization, and the ease with which it can be recovered and recycled enable its successful employment as a solvent in a wide range of synthetic applications, including organometallic chemistry, catalysis, biphasic reactions, oxidations, and radical reactions.
Collapse
Affiliation(s)
- Ugo Azzena
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Massimo Carraro
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Luisa Pisano
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Serena Monticelli
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| | - Roberta Bartolotta
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| | - Vittorio Pace
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| |
Collapse
|
34
|
Monticelli S, Colella M, Pillari V, Tota A, Langer T, Holzer W, Degennaro L, Luisi R, Pace V. Modular and Chemoselective Strategy for the Direct Access to α-Fluoroepoxides and Aziridines via the Addition of Fluoroiodomethyllithium to Carbonyl-Like Compounds. Org Lett 2019; 21:584-588. [PMID: 30600682 DOI: 10.1021/acs.orglett.8b04001] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An expeditious, high-yielding synthesis of rare α-fluoroepoxides and α-fluoroaziridines through the addition of the unkown fluoroiodomethyllithium (LiCHIF)-formed via deprotonation the commercially available fluoroiodomethane with a lithium amide base-to carbonyl-like compounds is documented. The ring-closure reactions, leading to α-fluorinated three-membered heterocycles, rely on the diversely reactive C-I and C-F bonds. Excellent chemoselectivity was observed in the presence of highly sensitive functionalities-aldehyde, ketone, nitrile, alkene-which remained untouched during the homologation sequence.
Collapse
Affiliation(s)
- Serena Monticelli
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , A-1090 Vienna , Austria
| | - Marco Colella
- Department of Pharmacy - Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Veronica Pillari
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , A-1090 Vienna , Austria
| | - Arianna Tota
- Department of Pharmacy - Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Thierry Langer
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , A-1090 Vienna , Austria
| | - Wolfgang Holzer
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , A-1090 Vienna , Austria
| | - Leonardo Degennaro
- Department of Pharmacy - Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Renzo Luisi
- Department of Pharmacy - Drug Sciences , University of Bari "A. Moro" , Via E. Orabona 4 , Bari 70125 , Italy
| | - Vittorio Pace
- University of Vienna , Department of Pharmaceutical Chemistry , Althanstrasse, 14 , A-1090 Vienna , Austria
| |
Collapse
|
35
|
Ganiek MA, Ivanova MV, Martin B, Knochel P. Mild Homologation of Esters through Continuous Flow Chloroacetate Claisen Reactions. Angew Chem Int Ed Engl 2018; 57:17249-17253. [PMID: 30290045 DOI: 10.1002/anie.201810158] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 09/25/2018] [Indexed: 12/11/2022]
Abstract
The selective chloromethylenation of functionalized esters using chloroacetic acid (CA) and LiHMDS (HMDS=hexamethyldisilazide) in a continuous-flow setup is reported. This Claisen homologation is for the first time extended to bis-chloromethylenation using dichloroacetic acid (DCA), thus giving access to under-explored α,α'-bis-chloroketones. The use of flow conditions enables efficient generation and reaction of the unstable chloroacetate dianion intermediates, leading to unprecedented mild and scalable reaction conditions at an economical reagent stoichiometry (-10 °C, <1 min, 1.0-2.4 equiv dianion). The clean reaction profiles allow subsequent use of the unpurified crude products, which is demonstrated in the synthesis of various heterocycles of broad interest. Furthermore, we report a novel, catalyst-free substitution of the obtained monochloro ketone products with (hetero)aryl zinc enolates to give valuable 1,4-diketones.
Collapse
Affiliation(s)
- Maximilian A Ganiek
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Maria V Ivanova
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Benjamin Martin
- Novartis Pharma AG, Chemical Development, Fabrikstrasse, 4002, Basel, Switzerland
| | - Paul Knochel
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| |
Collapse
|
36
|
Ganiek MA, Ivanova MV, Martin B, Knochel P. Milde Chlorhomologisierung von Estern durch Chloracetat‐Claisen‐Reaktion unter kontinuierlichen Durchflussbedingungen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810158] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Maximilian A. Ganiek
- Ludwig-Maximilians-Universität München Department Chemie Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Maria V. Ivanova
- Ludwig-Maximilians-Universität München Department Chemie Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Benjamin Martin
- Novartis Pharma AG Chemical Development Fabrikstraße 4002 Basel Schweiz
| | - Paul Knochel
- Ludwig-Maximilians-Universität München Department Chemie Butenandtstraße 5–13, Haus F 81377 München Deutschland
| |
Collapse
|
37
|
Castoldi L, Monticelli S, Senatore R, Ielo L, Pace V. Homologation chemistry with nucleophilic α-substituted organometallic reagents: chemocontrol, new concepts and (solved) challenges. Chem Commun (Camb) 2018; 54:6692-6704. [PMID: 29850663 DOI: 10.1039/c8cc02499e] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The transfer of a reactive nucleophilic CH2X unit into a preformed bond enables the introduction of a fragment featuring the exact and desired degree of functionalization through a single synthetic operation. The instability of metallated α-organometallic species often poses serious questions regarding the practicability of using this conceptually intuitive and simple approach for forming C-C or C-heteroatom bonds. A deep understanding of processes regulating the formation of these nucleophiles is a precious source of inspiration not only for successfully applying theoretically feasible transformations (i.e. determining how to employ a given reagent), but also for designing new reactions which ultimately lead to the introduction of molecular complexity via short experimental sequences.
Collapse
Affiliation(s)
- Laura Castoldi
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| | - Serena Monticelli
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| | - Raffaele Senatore
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| | - Laura Ielo
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| | - Vittorio Pace
- University of Vienna, Department of Pharmaceutical Chemistry, Althanstrasse, 14, A-1090, Vienna, Austria.
| |
Collapse
|
38
|
Monticelli S, Rui M, Castoldi L, Missere G, Pace V. A practical guide for using lithium halocarbenoids in homologation reactions. MONATSHEFTE FUR CHEMIE 2018; 149:1285-1291. [PMID: 29983454 PMCID: PMC6006224 DOI: 10.1007/s00706-018-2232-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 05/13/2018] [Indexed: 12/24/2022]
Abstract
ABSTRACT Lithium halocarbenoids are versatile reagents for accomplishing homologation processes. The fast α-elimination they suffer has been considered an important limitation for their extensive use. Herein, we present a series of practical considerations for an effective employment in the homologation of selected carbon electrophiles. GRAPHICAL ABSTRACT
Collapse
Affiliation(s)
- Serena Monticelli
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Marta Rui
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Laura Castoldi
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Giada Missere
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| | - Vittorio Pace
- Department of Pharmaceutical Chemistry, University of Vienna, Vienna, Austria
| |
Collapse
|
39
|
Merging lithium carbenoid homologation and enzymatic reduction: A combinative approach to the HIV-protease inhibitor Nelfinavir. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
40
|
Senatore R, Ielo L, Urban E, Holzer W, Pace V. Substituted α-Sulfur Methyl Carbanions: Effective Homologating Agents for the Chemoselective Preparation of β-Oxo Thioethers from Weinreb Amides. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800095] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Raffaele Senatore
- Department of Pharmaceutical Chemistry; University of Vienna; Althanstrasse 14 - 1090 Vienna Austria
| | - Laura Ielo
- Department of Pharmaceutical Chemistry; University of Vienna; Althanstrasse 14 - 1090 Vienna Austria
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences; University of Messina; Viale Annunziata 98168 Messina Italy
| | - Ernst Urban
- Department of Pharmaceutical Chemistry; University of Vienna; Althanstrasse 14 - 1090 Vienna Austria
| | - Wolfgang Holzer
- Department of Pharmaceutical Chemistry; University of Vienna; Althanstrasse 14 - 1090 Vienna Austria
| | - Vittorio Pace
- Department of Pharmaceutical Chemistry; University of Vienna; Althanstrasse 14 - 1090 Vienna Austria
| |
Collapse
|
41
|
Castoldi L, Ielo L, Holzer W, Giester G, Roller A, Pace V. α-Arylamino Diazoketones: Diazomethane-Loading Controlled Synthesis, Spectroscopic Investigations, and Structural X-ray Analysis. J Org Chem 2018; 83:4336-4347. [DOI: 10.1021/acs.joc.7b03134] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Laura Ielo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Annunziata, 98168 Messina, Italy
| | | | | | - Alexander Roller
- X-Ray Structure Analysis Center, University of Vienna, Waehringerstrasse 42, A-1090 Vienna, Austria
| | | |
Collapse
|
42
|
Chen H, Ye JL, Huang PQ. Chemoselective direct reductive trifluoromethylation of amides: a flexible access to functionalized α-trifluoromethylamines. Org Chem Front 2018. [DOI: 10.1039/c7qo01031a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one-pot method is reported for the direct transformation of secondary amides to α-trifluoromethylamines.
Collapse
Affiliation(s)
- Hang Chen
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jian-Liang Ye
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Pei-Qiang Huang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| |
Collapse
|
43
|
Boufroura H, Sevaille L, Gigant N, Drège E, Joseph D. The dual reactivity of Weinreb amides applied to the late-stage divergent functionalisation of meso pyrrolidines. NEW J CHEM 2018. [DOI: 10.1039/c8nj01975d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dual reactivity of Weinreb amides was exploited to prepare diversified symmetrical and dissymmetrical 2,5-disubstituted pyrrolidines from simple building blocks.
Collapse
Affiliation(s)
- Hamza Boufroura
- BioCIS
- Université Paris-Sud
- CNRS
- Université Paris-Saclay
- F-92296 Châtenay-Malabry
| | - Laurent Sevaille
- BioCIS
- Université Paris-Sud
- CNRS
- Université Paris-Saclay
- F-92296 Châtenay-Malabry
| | - Nicolas Gigant
- BioCIS
- Université Paris-Sud
- CNRS
- Université Paris-Saclay
- F-92296 Châtenay-Malabry
| | - Emmanuelle Drège
- BioCIS
- Université Paris-Sud
- CNRS
- Université Paris-Saclay
- F-92296 Châtenay-Malabry
| | - Delphine Joseph
- BioCIS
- Université Paris-Sud
- CNRS
- Université Paris-Saclay
- F-92296 Châtenay-Malabry
| |
Collapse
|
44
|
Touqeer S, Castoldi L, Langer T, Holzer W, Pace V. Homologation of halostannanes with carbenoids: a convenient and straightforward one-step access to α-functionalized organotin reagents. Chem Commun (Camb) 2018; 54:10112-10115. [DOI: 10.1039/c8cc04786c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A direct, single synthetic homologative transformation of halostannanes into mono- or di-substituted methyl analogues is documented.
Collapse
Affiliation(s)
- Saad Touqeer
- University of Vienna
- Department of Pharmaceutical Chemistry
- Vienna
- Austria
| | - Laura Castoldi
- University of Vienna
- Department of Pharmaceutical Chemistry
- Vienna
- Austria
| | - Thierry Langer
- University of Vienna
- Department of Pharmaceutical Chemistry
- Vienna
- Austria
| | - Wolfgang Holzer
- University of Vienna
- Department of Pharmaceutical Chemistry
- Vienna
- Austria
| | - Vittorio Pace
- University of Vienna
- Department of Pharmaceutical Chemistry
- Vienna
- Austria
| |
Collapse
|